Oh yeah.. for later on in the war, it pays not to get pinged in the first place. You can pretty much kiss your shiny boat goodbye if they figure out your location. That's why it's important later on to REALLY use stealth with your approach of anything a warship is involved in (or don't go near anything that even looks like it's winking at a warship.) Plan that attack like you would plan a chess move (IE.. plan several moves in advance). As the war goes on, their sonar gets better and their pings can read deeper. With hedgehogs in the picture, you do NOT want them knowing where you are.
Also.. the name of this thread sounds like a potential future Dr. Seus book title.